LSEG outage suspends trading on AIM stocks

Several securities have been halted with only FTSE 100, FTSE 250 and IOB securities still operational.

The London Stock Exchange (LSE) is currently investigating an outage which has left just FTSE 100, FTSE 250 and IOB securities still available for trading.

As of 4.10pm today, LSE was still investigating the fault, The TRADE understands, with no word yet as to timeframes.

AIM stocks specifically are currently halted, with the exchange confirming that “orders in all other instruments currently halted will now be expired”.

This outage is likely to lead to a renewed interest from regulators pertaining to how trading venues should reinforce their operations to be more resilient to the event of market outages – specifically as regards their communications. 

Read more – ESMA publishes recommendations for trading venues in the event of a market outage

LSE is set to provide further updates through its live portal as it undertakes immediate analysis of the situation.

In June, SIX Swiss Exchange experienced its worst outage for over 10 years, halting trading for three hours, The TRADE previously revealed. 

Other previous outages include Nasdaq’s Nordic markets which closed on 16 November 2022 without an auction, while marketplaces of the European exchange operator, Euronext, also suffered a three-hour interruption to trading on 19 October 2020. 

Deutsche Börse also experienced two separate outages during 2020 due to software glitches. 

Read more – EU watchdog raises concerns on third-party reliance after exchange outages in 2020

The issue is also one present outside of the EU, with a software issue coinciding with the launch date for the upgraded ASX Trade system, provided by Nasdaq, which forced the ASX to shut down for four hours on 16 November.